Movements are underway to carry out marine and atmospheric observations by applying measurements obtained by biologging methods, through devices attached to the bodies of animals in the wild. The author and his colleagues have carried out research assimilating this data into ocean current prediction models, thereby increasing their accuracy. By systematically integrating biologging data into ocean observation networks, they can be strengthened both in quality and quantity. The ocean current data generated by applying the data from these strengthened marine observation networks could contribute to the pioneering of a new field in marine science.